Member? can be used with lists or agentsets, but is more commonly used with lists. Member? reports True if the given value or agent appears in the given list or agentset, and takes the form member? value list or member? agent agentset. For example, show member? 5 [ 3 4 5 6 ] would report True, and show member? 5 [1 3 2 ] would report False; show member? turtle 0 turtle would report True, while show member? patch 0 turtles would report False.
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member? primitive: